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OpenCloudOS-Kernel
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[IPSEC]: Check x->encap before dereferencing it 

We need to dereference x->encap before dereferencing it for encap_type.
If it's absent then the encap_type is zero.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2006-04-04 12:51:05 -07:00 committed by David S. Miller
parent 6764472631
commit 8bf4b8a108
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/xfrm4_input.c
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@ -90,7 +90,7 @@ int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
if (unlikely(x->km.state != XFRM_STATE_VALID))
goto drop_unlock;
if (x->encap->encap_type != encap_type)
if ((x->encap ? x->encap->encap_type : 0) != encap_type)
goto drop_unlock;
if (x->props.replay_window && xfrm_replay_check(x, seq))